Clock



FIG. 1 shows a front perspective view of my claimed design.

FIG. 2 shows a front view of my claimed design.

FIG. 3 shows a top plan view of my claimed design.

FIG. 4 shows a left side view of my claimed design.

FIG. 5 shows a right side view of my claimed design.

FIG. 6 shows a rear view of my claimed design; and,

FIG. 7 shows a bottom plan view of my claimed design. 

The ornamental design for a clock, as shown and described. 